HD 290327 b

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HD 290327 b
Exoplanet List of exoplanets
Parent star
Star HD 290327
Constellation Orion
Right ascension (α) 05h 23m 21.56s[1]
Declination (δ) –02° 16′ 39.4″[1]
Apparent magnitude (mV) 8.96
Distance 180 ± 20[1] ly
(57 ± 5[1] pc)
Spectral type G5IV
Orbital elements
Semi-major axis (a) 3.35 AU
(502 Gm)
    61.1 mas
Orbital period (P) 2443 d
(6.69 y)
Physical characteristics
Minimum mass (m sin i) 2.54 MJ
Discovery information
Discovery date October 19, 2009
Discoverer(s) Naef et al.
Discovery method radial velocity (HARPS)
Discovery site La Silla Observatory
Discovery status Published[2]
Other designations
HIP 25191 b
Database references
Extrasolar Planets
Exoplanet Archive data
Open Exoplanet Catalogue data

HD 290327 b (also known as HIP 25191 b) is an extrasolar planet which orbits the G-type subgiant star HD 290327, located approximately 180 light years away in the constellation Orion. This planet has at least five halves the mass of Jupiter and takes 6.7 years to orbit the star at a semimajor axis of 3.35 AU.[2] However unlike most other known exoplanets, its eccentricity is not known, but it is typical that its inclination is not known. This planet was detected by HARPS on October 19, 2009, together with 29 other planets.


Coordinates: Sky map 05h 23m 21.5647s, −02° 16′ 39.428″